Instructions :1. Preheat oven to 175 Deg Cel.2. Grease and line 9x13" pan.3. Sift together flour, baking soda, cocoa powder and salt.4. Cream together margarine and sugar until light and fluffy.5. Beat in eggs one at a time, then stir in vanilla.6. Beat in flour alternately with milk, mixing just until incorporated.7. Pour batter into pan and bake for 40-45 mins. Allow to cool on a wire rack. Garnish as desired.